Timing device.



WIT D T E FF C PAUL s. LUTTRELL, or OAKLAND, oAIJironNIArAssreNoR TO/REMINDER CLOCK or r OAKLA D, CALIFORNIA, A oonron'a'rroivor CALIFORNIA.

' TIMING DEVICE. i

1,213,516. specifieatien of e t Patent Patented J an; 23,1917. a licatio filed him at, 1915. Serial No. 37,355.

To all whom it may concern: 8 l which in turn is mounted on a disk 11' se- IBeit known that I,PAUL S. LUTTRELL', a

citizen of the United States, residing at- Oakland, in the county of Alameda and State of California, have invented new and.

cured to shaft 4, as indicated at 12. Mounted on the opposite side of the disk 18 the second pawl 8 which is engageahle with a recess 13 formed in the faceof a useful Improvements in Timing Devices, of, S BWe-H, loosely mounted .exteriorly,v of the -which the following is a specification; i winding shaft 5. Secured to the inner end I This inventionrelates to atiming device, f sliaftd' is a second disk 15,,upori which l, v v and particularly to what may be knownas' pawl .9 is carried, and loosely mounted on interval clocks or clocks that are adapted to he hub 16 of disk 15. is a spur gear'17 which 65 i be set so as to run for a predetermined is adapted-t0 turn in unison With shaft 4:, i 1

period of time and at the end of thatperiod disk and pa When the P is moved stop running and at the same time sound an Into-engagement with a pin 18 secured in alarm, giving notice that the predetermined the hub of gear 17. o interval of time has elapsed. Intermeshing with gear 17 is a second 7 The object of the presentinventio i t spur gear 19 which is secured upon a windimprove the construction of the device of g' t h h One end Of the alarm th Character d ibed. 1 5 ak it fool-- spring 21. is secured, and driven by said proof, simple and substantial and cheaprt'o' h f .i aster g r 22 Which operates a 20 manufacture. p knocker arm 23, the outer end of which en- The invention consists of the partsand gages the-bell .24: to sound an'alarmJ The the construction and combination f parts gear train employed in connection with the I as hereinafter more fully described and. bell alarm here shown is 0f t r 60nclaim-ed, having reference to the accompany Stfllctioll, Such as u in Ordinary rm 2 ing drawings, in Which I I clocks, the only difference being the pro- 30 Figure l is a front view of thetiming de- "151011 13 gears 17 andlg by which 7 vice. Fig. 2 is a section on line 2-2, Fig. 3.- he spr ng is wo nd.

Fig. 3 is a cross section of the casing, show- The t er p r Of he clock mechanism ing the clock mechanism in' elevatiom Fig. p ye for rni g he indicator arm 30 4 is an enlarged section of the winding, f also Operating h p for the alarm shafts, with connectedgears and operating actuated from the Second g shaft key. 4 i 5 through means of a ratchet gear 25. which Referring in detail to the accompanying g g a double ratchet p 26 u ddrawings. Aindicates the bearing plates, be-f 1.1.2111 M11127 h h i Secured pon the tween which the clock mechanism is mountlo s ly mounted sleeve 4' Themain clock ed; B an inclosingsheet-m-etal casingof 1 i g 2 Secured at it i'nn r end to the suitable shape and construction; 2 a-gradu sleeve 14 andat its outer end to a post 29' ated dial plate; and 3'the indicator hand. Secured main frame plate The The clock mechanism proper: is divided into S a 5 and ain C o D g 8 en o w 40; two groups, one group of gears operating an woundwill'return to the'unwound position alarm device and the other gear train opern he 11 nn r; the return movement sting the indicator hand and a trip mechabeing controlled by the usualform of escapenism for the alarm. The alarm and indiment, generally indicated at 30, which is. cator hand mechanism'are'set and wound driven from a gear 31 'securedon shaft 5.-

45'by means of two winding shafts 4 and 5v In operation. when it is desired to set the c which are adapted to turn in unison andiniming e it D iS d y rning dependent of each other'threugh means of a g the main exterior winding key 6 in the diknurled windingkevfi and attached ratchet rection of arrow at. The pin 10 on. the hub pawls indicated at 7-. 8 and 9, This is acof the keywill thus engage pawl 7 causing 5o com lished in the following manner: The it to turn disk 11. with connected shaft 4,105'

winding kev proneris looselv mounted on in the same di ection. Movement is in this the outer end of shaft 4:. in front. of the dial manner immediately transmitted to turn plate2. and the hub section of same is prodisk .15. with attachedpawl 9, causing it to vi 'ed with arr-upwardly 'p'roiec-ting pin 10f engage pin 18 on the spur gear 17. thereby 15 which adapted to engage; the, pawl 7, J operating the connected gear 19 and causing i1 the alarm spring to be Wound or set. The position of the pawls 7 and 9 is such that shaft 4: will be turned half a revolution before pawl 8 will drop into recess 13, formed on the sleeve 14; in other words, the alarm spring will be wound and set before pawl 8 engages with shoulder 13 and any movement is transmitted to turn the exterior winding shaft 5. Further turning movement of the key 6, after pawl 8 has been moved into engagement with recess 13, will cause sleeve 14, with connected arm 27 to move in the same direction, causing the main cock spring 28 to become wound and the dial hand 3 to be moved as this is secured on .the sleeve 14:; the key being turned until the desired time is indicated by the hand. The key is then released permitting the clock mechanism to operate and return the hand to zero position, causing the clock to stop and at the same time an alarm to be given. The return movement or speed of the indicator hand 3 is limited by the turning movement of shaft 5 and the escapement30; the indicator hand turning in unison with sleeve 14 and arm 27 through means of the double pawl 26 which engages with the teeth in ratchet wheel 25 secured upon shaft 5.

The return movement of shaft 5 caused by the driving action of the main-clock spring 28 through arm 27, pawls 26 and ratchet gear'25, which is limited by the escapement movement 30, will finally bring the indicator arm 3 back to zero position.

Instantaneously with the arrival of the hand 3 at this point the lower end-33 of arm 27 engages with a bell-crank 34 tripping this and releasing the alarm mechanism to permit. the knocker arm to operate. The alarm is thus given instantly with the arrival of thefindicator hand at zero position, giving the desired warning.

The provision of the loosely mounted winding key 6 makes the structure as a whole practically fool-proof as the key can be turned as often as desired in the wrong in other words, the movement of the indi-.

cator arm will'not efiect the successful operation of the alarm as the alarm spring is already sufliciently wound before the hand is moved. The hand can in this manner be distance, as the case may be.

The provision of the double pawl 26, which engages the ratchet-gear 25, of standard construction, having sixty teeth permits the hand to be set at points on the dial indicating minutes or half minutes as one pawl is a little shorter than the other; the

A timing device constructed as here shown is neat in appearance, simple and substantial in construction and absolutely fool-proof as turning movement of the key in the wrong direction will not effect the operating mechanism in any manner.

The device may be used for many purx poses, for instance, as a timing device in connection with culinary purposes of'all kinds, both in the home and factory. It may also be used to great advantage in connection with photographic work, such as printing and developing time exposures, etc. It has also been found useful in connection with many of the manufacturing arts where the element of timeenters as a necessary factor and also as a timer in telephone oflices where long distance calls are controlled by time.

The materials and finish of the several parts of the timing device are such as the experience and judgment of the manufacturer may dictate. V

Iwish it understood that various changes in form, proportions and minor details of construction may be resorted to within the.

scope of the appended claims and that I do not wish to limit myself to the specific design and construction here shown.

Having thus described my invention, what I claim anddesire to secure by Letters Patent is 1. In a timing device, an alarm mechanism, a connected spring-actuated drivin mechanism, an indicator hand, a connected spring-actuated driving mechanism, a pair,

of winding shafts, one connected with the alarm driving mechanism and the other with the indicator driving mechanism, means for turning the alarm winding shaft, and means on the alarm winding shaft for turning the other winding shaft.

2. In a timing device, an alarm mechanism, a connected spring-actuated driving mechanism, an indicator hand, a connected spring-actuated driving mechanism, a pair of winding shafts one interior of the other,

' spring-actuated driving 'mechanism, a pair" one connected with the "alarm driving "mechanism andthe other with the indicator driving mechanism, and means'for'turning said shafts independently of ,each other and in unison with each other. we U 3. In a timing" device, an alarm mechanism, a connected spring-actuated driving mechanism, anindicator hand, a connected spring-actuated driving mechanism,'-a Winding shaft connected with the alarm driving mechanism, a winding keyloosely mounted on said shaft, a ratchet member secured on the shaft, a pin on the winding key engageable with said ratchetr'memberto turn the ratchet and shaft, a tubular shaft 'exteriorly of the alarm winding shaft connectedwit the indicator hand driving mechanism, and means for automatically coupling said shaft to turn in unison with the Winding key and alarm winding shaft.

5. In a timing device, an alarm mechanism, a connected spring-actuated driving mechanism, an indicator hand, a'connected of winding shafts, oneconnected with the shaft, a trip mechanism connected with the spring-actuated driving mechanism, a,wind-. 'ing shaft connected with the alarm driving imec'hanism, a windingkey loosely mounted on said shaft, a ratchet member secured on the shaft, a pin on thewinding key engageable with said ratchet member to turn the Y ratchet and shaft, a tubular shaft exteriorly I (if the alarm winding shaft connected with the indicator hand driving mechanism, and

a second ratchet member secured toethe first named winding shaft engageable; with a member on the tubular winding shaft to turn 50 said shaft.

6. In a.timing device,jan alarm 'mechanlsm, a connected spr1ng actuated, driving spring-actuated driving mechanism, atpair alarm driving mechanism and the other with the indicator driving mechanism, means for turning the alarm winding shaft, means on said shaft for turning the other winding alarm mechanism, and means on the "last named shaft for releasing the trip mechamsm' v V termined distance. mechanism, an 1nd1cator hand, a connected 7. In a timing device, an alarm mechanism, a connected spring-actuated cdrivlng spring-actuateddriving mechanism, apair mechanism, an indicator hand, 'aconnected ofwin'ding-shafts", one connected "with the alarm i1 driving ,mecha'nism' I and the other with-the indicator driving mechanism, a

' Winding key loosely mounted on thealarm winding, shaft, meansfor automatically lockingthe shaft to "turn in unison with" the ,key, means for automatically coupling the indicator hand winding shaft to turn in unison f'with the alarm Windingsha'ft and Winding key, a trip mechanism connected with the alarm mechanismfand means on the lndicator'hand windlng shaft for releasing the trip. I

, I 8. In a timing device, an alarm" mecha-' nism, a connected "spring actuated driving mechamsm, an lndicator hand, a connected spring-actuated driving mechanism, a windmg shaft connected with the alarm driving mechanism, a windingkey loosely mounted on said shaft, a ratchet member secured on the shaft, a pin on the winding key engageable with said ratchet member to turn the ratchetand shaft, a tubular shaft exteriorly of the alarm Winding shaft connected" with the indicator hand driving mechanism, a

secondratchet member secured to the first named v winding'shaft engageable with a member on the tubular Windingshaft to turn said shaft, a trip mechanism connected V with the alarm mechanism, and means onthe tubular shaft for releasing the trip.

9. The combination with the two Winding shafts mounted one interior of the other, of a safety key loosely turnable on the exterior shaft, means for automatically coupling the key to said'shaft, and means'for automatically "coupling said shaft, to the lIltQIlOI' shaft to cause same to turn in unison.

" 10. In a timing device, the combination with the alarm winding shaft and thembular shaft, of a winding key loosely turnable on the alarm winding shaft in'one directlon, means for, automatlcally coupling the key to the shaft when it is turned" in the'opposite direction, and meansfor auto- :matically coupling the tubular shaft toturn in unison with the alarm windingshaft after said shaft has beenturned a prede- 11. a timingdevice, an alarm rmechmechanism, an indicator hand, a connected spring-actuated driving mechanism, pair of Winding shafts, one interior of the other,

A anism, a connected spring-actuated driving one connected with the alarm driving mechif anism and the other with the indicator driving mechanism, means for manually turning the inner shaft and means for auto maticallyconnecting the exteriorshaft to turn in unison with the inner shaft after the inner shaft has been turned a half revolution.

12, In a timing device the-combination with the inner and outer Winding shafts of a ratchet gear securedon the outer shaft, a sleeve turnably mounted on said shaft, an arm secured on-the sleeve and a pair of pawls carried by the arm, engageable With the ratchet gear, one of said paWls being a longer than the other and one pawl adapted to assume a position intermediate of a pair of teeth on the ratchet gear While the other pawl is in engagement and vice versa.

13. In a timingdevice, an alarm mecha nism, a connected spring-actuated driving mechanism, an indicator hand, a connected spring'actuated driving mechanism, a pair of winding shafts,'one interior of the other, one connected Withthe alarm driving mechanism and i the other With the indicator driving mechanism, a key mounted on the inner shaft adapted to turn free on the shaft in one direction, and means for locking the key to turn the shaft When turned in the opposite'direction, and means for automatioally connecting the exterior shaft to turn in unison With the inner shaft after the inner shaft has been turned a half revolution.

Copies of this patent may be obtained for 14.]In a timingfidevi'ce, thecombination with the alarm winding shaft and the tubular shaft, of a winding key loosely turn-. able o'nthe alarm Winding: shaft in one direction, means for automatically coupling the key "to the shaftuwhen it is turned in the opposite direction, and means for automatically coupling the tubular shaft to turn set my hand in the presence of two sub scribing witnesses.

p RAUL 's. LUTTRELL.

Witnesses:

JOHN H. Hnnnrne, W.WV. HEALEY.

five cents each, by addressing the Commissioner of Iatente. Washington, D. C. i 

